In order to solve the problem of insufficient actual combat training of weapon system in service support training of grass-roots units, the virtual training system of certain type equipment is designed. Based on virtual reality(VR), according to the shape data, performance parameters and working principle of the weapon system, the virtual environment of the weapon system is constructed, and the training system is modularized. Under the premise of ensuring the trainer safety, the trainer can learn the theoretical knowledge of multiple weapons like playing a game, and carry out the man-machine contract training and multi person cooperative training in the set battlefield environment to complete the ammunition service support task. The results show that the design can significantly improve the training effect, greatly reduce the economic cost, and the training work is more convenient.